Posted by Anonymous on Monday, August 13, 2012 at 8:53pm.
If Ø is your angle, and since
r=√(a^2 + b^2)
sinØ = b/r
cscØ = r/b
cosØ = a/r
secØ = r/a
tanØ = b/a
cotØ = a/b
These definitions should be in your textbook and are probably defined in terms of x, y and r.
You should memorize them
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